Three-phase adjustable voltage and current protection

Three-Phase Adjustable Voltage and Current Protector is an intelligent protection device designed for reliable monitoring and protection of three-phase electrical systems and equipment. The device provides protection against overvoltage, undervoltage, overcurrent, phase imbalance and incorrect phase sequence while continuously monitoring electrical parameters in real time.

It is suitable for industrial installations, electrical panels, three-phase motors, generators, photovoltaic systems, compressors, pumps, CNC machines and other three-phase equipment requiring stable and secure power protection.

Main Features:

Overvoltage protection
Undervoltage protection
Overcurrent protection
Phase imbalance protection
Phase sequence protection
Automatic recovery after fault
Adjustable delay times
Real-time voltage and current monitoring for each phase
LCD display with real-time indication
Adjustable protection thresholds
Suitable for 220V and 380V three-phase systems
DIN rail installation

Display Information:

L1 / L2 / L3 phase voltage display
L1 / L2 / L3 current display
Overvoltage indication
Undervoltage indication
Overcurrent indication
Protection status display
Parameter settings menu

Adjustable Parameters:
Power-on delay: 1 – 500 seconds
Overvoltage protection range: 230V – 300V (220V systems) / 390V – 500V (380V systems)
Overvoltage recovery range: 225V – 295V / 385V – 495V
Overvoltage recovery delay: 1 – 500 seconds
Overvoltage action time: 0.1 – 30 seconds
Undervoltage protection range: 140V – 210V / 260V – 370V
Undervoltage recovery range: 145V – 215V / 265V – 375V
Undervoltage recovery delay: 1 – 500 seconds
Undervoltage action time: 0.1 – 30 seconds
Phase imbalance range: 20V – 99V
Phase imbalance recovery: 5V – 94V
Phase sequence protection: ON / OFF
Overcurrent protection: 1A – 63A / 80A / 100A
Overcurrent recovery delay: 1 – 500 seconds
Overcurrent action time: 0.1 – 30 seconds
Current deviation adjustment: -9.5% to +9.5%
Continuous overcurrent protection count: 1 – 20 / OFF

Technical Specifications:
Power supply: AC 220V / AC 380V
Frequency: 50/60Hz
Rated current: 40A / 63A / 80A / 100A
Measurement accuracy: 1%
Voltage measuring range: 40V – 300V / 70V – 700V
Output contact: 3NO
Electrical life: 100,000 cycles
Mechanical life: 1,000,000 cycles
Protection rating: IP20
Operating temperature: -30°C to +70°C
Humidity: ≤50% at +40°C (non-condensing)
Max altitude: ≤2000m
Dimensions: 95 x 90 x 66 mm